CHM 130 Fundamental Chemistry
Final Exam Questions Fully Solved
2025-2026 Updated.
Law of Conservation of Mass: - Answer there is no change in the total mass of the
substances reacting in a balanced chemical reaction; thus, no material is lost or gained as
original substances are changed to new substances
Theoretical Yield: - Answer amount of product (100%) we would expect if all the reactants
were converted to the desired product
Actual Yield: - Answer the measure of mass of the product when a reaction ends
Percent Yield: - Answer (actual yield/theoretical yield) x 100%
The maximum number of electrons that may occupy the third energy level is... - Answer 18
What shape is the s sublevel? - Answer spherical
Wavelength (lambda): - Answer the distance from a crest or trough in the wave to the next
trough or crest in the wave
Frequency (fancy lookin v): - Answer number of times the crests of a wave pass a point in 1s
v = c (speed of light)/lambda
lambda = c/v
c = lambda(v) - Answer
Electromagnetic spectrum: - Answer an arrangement of different types of electromagnetic
radiation fro the longest wavelength to shortest wavelength or from lowest energy to highest
energy
An electron can change from one energy level to a higher energy level only if it... - Answer
, When 2 electrons are in the same orbital, they will... - Answer repel each other unless their
magnetic fields cancel--this only happens when the 2 electrons spin in opposite directions
The total # of electrons in all the sublevels adds up to give... - Answer the electrons allowed
in an energy level
What does an orbital diagram show you? - Answer The placement of the electrons in the
orbitals in order of increasing energy
The group numbers indicate the number of... - Answer valence electrons for the elements in
each of vertical column
The atomic size of an atom is determined by the distance of... - Answer valence electrons
from the nucleus
For elements going across a period, the number of protons in the nucleus.... - Answer
increases the (+) charge of the nucleus; as a result the electrons are pulled closer to the nucleus,
which means that the atomic size of elements decreases going L to R across a period
Ionization energy: - Answer the energy needed to remove one electron from an atom in the
gaseous state
Understanding stoichiometric relationships enables you to... - Answer predict amounts of
products formed
The limiting reactant in a completed chemical reaction will be the substance... - Answer used
up
As you move down a group on the periodic table, the atomic radii of the elements... - Answer
increase
When an atom loses electrons, it... - Answer becomes smaller
Relative to position in the periodic table, what charges do the ions of elements typically have? -
Final Exam Questions Fully Solved
2025-2026 Updated.
Law of Conservation of Mass: - Answer there is no change in the total mass of the
substances reacting in a balanced chemical reaction; thus, no material is lost or gained as
original substances are changed to new substances
Theoretical Yield: - Answer amount of product (100%) we would expect if all the reactants
were converted to the desired product
Actual Yield: - Answer the measure of mass of the product when a reaction ends
Percent Yield: - Answer (actual yield/theoretical yield) x 100%
The maximum number of electrons that may occupy the third energy level is... - Answer 18
What shape is the s sublevel? - Answer spherical
Wavelength (lambda): - Answer the distance from a crest or trough in the wave to the next
trough or crest in the wave
Frequency (fancy lookin v): - Answer number of times the crests of a wave pass a point in 1s
v = c (speed of light)/lambda
lambda = c/v
c = lambda(v) - Answer
Electromagnetic spectrum: - Answer an arrangement of different types of electromagnetic
radiation fro the longest wavelength to shortest wavelength or from lowest energy to highest
energy
An electron can change from one energy level to a higher energy level only if it... - Answer
, When 2 electrons are in the same orbital, they will... - Answer repel each other unless their
magnetic fields cancel--this only happens when the 2 electrons spin in opposite directions
The total # of electrons in all the sublevels adds up to give... - Answer the electrons allowed
in an energy level
What does an orbital diagram show you? - Answer The placement of the electrons in the
orbitals in order of increasing energy
The group numbers indicate the number of... - Answer valence electrons for the elements in
each of vertical column
The atomic size of an atom is determined by the distance of... - Answer valence electrons
from the nucleus
For elements going across a period, the number of protons in the nucleus.... - Answer
increases the (+) charge of the nucleus; as a result the electrons are pulled closer to the nucleus,
which means that the atomic size of elements decreases going L to R across a period
Ionization energy: - Answer the energy needed to remove one electron from an atom in the
gaseous state
Understanding stoichiometric relationships enables you to... - Answer predict amounts of
products formed
The limiting reactant in a completed chemical reaction will be the substance... - Answer used
up
As you move down a group on the periodic table, the atomic radii of the elements... - Answer
increase
When an atom loses electrons, it... - Answer becomes smaller
Relative to position in the periodic table, what charges do the ions of elements typically have? -
